Looking for a cute gift for your 'Big Sister'? Our Big Sis Acrylic Tumbler with lid says just that! Take it everywhere you go; to class, to the library, to workout, or to your next chapter meeting. Our 16 oz. tumbler is designed for both hot and cold beverages; cold stays cold, and hot stays hot. Dishwasher and microwave safe. Made in the USA and has a lifetime guarantee.